Callirhytis glomerosa Weld. 439. Fig* 114. Smooth, green, brown in sun, in 
fall, about 3 ram* in dia., over half projecting beyond bud scales. 
Callirhytis gallaestriatae Weld. 455. Fig.107. Spindle-shaped with a long 
stalked base, up to Jl mm. long, in late summer from weak lateral buds 
dropping in Sept. 
Stem galls 
Woody stem swellings 
Callirhytis cornigera (OLS.). 415. Fig.117. Horned Knot Gall. Abrupt, cuts 
like cheese in May-June, becoming woody, horns finally protruding. 
Callirhytis punctata (O.S.). 471. Fig.129. Oak Knot Gall. Abrupt, complete¬ 
ly encircling branch, covered with normal bark. 
Callirhytis seminosa (Bass.). 4 JQ, Fig.128. Abrupt, surface very irregular, 
cells near surface and very numerous. 
Detachable 
Dryocosmus imbricariae (Ashm.). 597* Banded Bullet Gall. Globular, 7-10 mm. 
in dia., single or in groups on twigs, dropping when mature in fall. 
Callirhytis gemmaria (Ashm.). 4 36 . Figs.155-6. Small ribbed galls in cluster 
in early spring, secreting honeydew when young, dropping when mature. 
Callirhytis excavata (Ashm.). 425. Figs.154,282. Lenticular polished cells 
bursting out thru cracks in bark and dropping in Sept. Type host. 
An isolated,deeply imbedded gall like g emmari a from Blain, Pa. 
Cells hidden under the bark 
Callirhytis medularis Weld. 447. Fig.l 66 . Cell in the pith. 
Callirhytis crypta (Ashm.). 418. Figs.162,501. Cells just under the bark in 
the wood. If mumerous the twig may be hypertrophied. 
Bassettia ceropteroides (Bass.). 57 8 . Slight enlargement at base of the 
annual growth in July, containing a few cells under the bark in wood. 
Leaf galls 
Detachable 
Amphibolips nubilipennis (Harris). 290. Fig. 509 . Like a green grape, almost 
translucent, succulent, up^to 21 mm. in dia., single on under side. 
Amphibolips inanis (0.S.).287* Fig.175* Empty Oak Apple. Produced singly 
on under side of leaf, "18-32 mm. in dia., light green,spotted. June. 
Dryocosmus rileyi (Ashm.). 401. Fig.257* Globular, brown, 5 mm. in dia., 
single on a main vein, usually on upper side, dropping in the fall. 
Dryocosmus deciduus (Beut.). 594. Fig.205. Black Oak Wheat. Cluster of up 
to 40 bursting out of midrib in Oct. 
Callirhytis piperoides (Bass.). 469. Fig.201. Cluster on upper or lower 
side, each spherical, red,pubescent, 1-4 mm. in dia. & dropping in fall. 
Callirhytis lanata (Gill.). 445. Fig.206. Woolly midrib cluster on under 
side of leaf, dropping before the leaves. 
Zopheroteras compressum (Gill.). 362. White, subglobular, on under side in 
fall just as leaves are turning. Type gall is ellipsoidal, 2*7 by 1.8 
by 1.8 mm, tan, slightly wrinkled. Included from literature. 
Zopheroteras sphaerula Weld. 3 66 . Nearly spherical, greenish or tinged 
with red, on upper or lower side of leaf, single or 3-4 in a row, 
dropping in Oct. Adults emerged Mar.13 and Apr .6 the next spring. 
Loxaulus beutenrauelleri Weld. 3^9* Reared from a midrub cluster looking 
like Callirhyti s piperoide s (Bass.) Fig.201. Adults emerged Apr. 6 ,22 
and May 11 the second spring. 
Integral 
Amphibolips confluenta (Harris). 280. Fig.174. Spongy Oak Apple. 
Amphibolips coelebs (O.S.). 279» Fig.191. Spindle-shaped, 28 by 4.5 mm., 
green, the prolongation of a vein. 
Dryocosmus palustris (Ashm.). 400. Fig.181. Globular, 10-17 mm.,with a 
free-rolling cell, wail 1 mm. thick,appearing very early in the spring. 
Andricus singularis (O.S.). 326. Fig.176. Small Oak Apple. 10-14 mm* in dia. 
75 
